The United States led international pressure for a swift re-run that would include all the major parties, brushing aside Hasina's insistence that a boycott by Zia's opposition did not undermine her legitimacy.

Zia, who has been confined to her home for about two weeks, reiterated her calls for Hasina to stand aside and let a neutral caretaker government organize the new election.

“I'm calling on the government to cancel the farcical polls, step down and reach an understanding (with the opposition) to organize a free, fair and neutral election under a non-party government,” she said in a statement released overnight.

“The scandalous election on January 5 not only demonstrated the people's lack of confidence in the government but also proved that free, fair, credible, peaceful and participatory elections cannot be held without a non-party neutral government and credible election commission.”

The opposition has enforced a 48-hour general strike since Monday to force Hasina to cancel the polls.

At least 26 people were killed during the election, the bloodiest vote in Bangladesh's history, while hundreds of opposition supporters torched or trashed polling stations.

The result was never in doubt, with Hasina's Awami League and a handful of allies winning all the seats being contested.

The vote's credibility had been undermined even before polling day as 153 Awami League members or allies were declared elected unopposed to the 300-seat parliament.

In a defiant appearance before the press on Monday, Hasina rejected any idea that the election's legitimacy had been compromised by the absence of Zia's Bangladesh Nationalist Party (BNP) and 20 other opposition parties.

But Zia, in her first comments since the election, called the low voter turnout a “silent revolution” against Hasina, while the Awami League had no “moral or constitutional grounds” to hold on to power.

“The people did not participate in the murder of democracy,” she said.

US Calls for New Vote

The U.S. also called for a new vote that would “credibly express the will” of the people.

“With more than half of the seats uncontested and most of the remainder offering only token opposition, the results of the just-concluded elections do not appear to credibly express the will of the Bangladeshi people,” said State Department deputy spokeswoman Marie Harf.

“While it remains to be seen what form the new government will take ... we encourage the government of Bangladesh and opposition parties to engage in immediate dialogue to find a way to hold as soon as possible elections that are free, fair, peaceful, and credible.”

U.N. leader Ban Ki-moon called for the two parties “to resume meaningful dialogue” urgently “for an inclusive political process.”

There was also criticism from former colonial power Britain, with junior foreign minister Sayeeda Warsi saying “the true mark of a mature, functioning democracy is peaceful, credible elections that express the genuine will of the voters.”